瘤胃发酵产物乙酸和丙酸比对奶牛生产性能及乳成分影响的荟萃分析

doi:10.16431/j.cnki.1671-7236.2021.05.012

Abstract

Abstract: This study aimed to determine the effect of rumen fermentation products of acetic acid and propionic acid as well as acetic acid to propionic acid ratio on dry matter intake,milk yield,and milk composition in dairy cow.By reviewing the published literature,a model was constructed using meta-analysis method to perform regression analysis and correlation analysis.A total of 181 treatments have been sorted out from 51 related literatures.The articles described the effects of different feed ingredients,nutrients,and feed additives on the rumen fermentation indicators and production performance of lactating dairy cows at different physiological stages.The results of meta-analysis of 51 experiments showed that,compared to rumen fermentation production of acetic acid and propionic acid,acetic acid to propionic acid ratio was more closely related to milk yield (R²=-0.426,P<0.01),milk fat percentage (R²=0.359,P<0.01),milk fat yield (R²=-0.257,P<0.01),volatile fatty acid (R²=-0.226,P<0.05),and dry matter intake (R²=-0.485,P<0.01).There was a extremely significant unary linear regression between acetic acid to propionic acid ratio and dry matter intake,milk fat yield,milk production,and milk fat percentage (P<0.01).Dry matter intake,milk fat yield,milk production would decrease extremely significantly when the ratio of acetic acid to propionic acid increased and milk fat percentage would increase extremely significantly (P<0.01).When the ratio of acetic acid to propionic acid in the rumen increased by 1,the milk fat proportion increased by 0.26%,and the dry matter intake,and milk production of dairy cows decreased by 2.34 and 4.99 kg respectively.Through meta-analysis,it was found that acetic acid to propionic acid ratio could predict the proportion of milk fat in milk more scientifically,and accurately reflect the change of milk fat rate.This study could provide reference for the selection of diet and the regulation of milk quality.

Key words: acetic acid to propionic acid ratio; production performance; milk composition; rumen fermentation; meta analysis

CLC Number:

S823.9⁺1

LUO Zhijie, MA Lu, BU Dengpan, QIN Xia. Meta-analysis:How the Ruminal Acetic Acid to Propionic Acid Ratio Affect the Production and Milk Composition of Dairy Cow[J]. China Animal Husbandry and Veterinary Medicine, 2021, 48(5): 1613-1624.

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Meta-analysis:How the Ruminal Acetic Acid to Propionic Acid Ratio Affect the Production and Milk Composition of Dairy Cow

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